compositions adapted to be reacted with hydrogen peroxide to provide chemiluminescent light are disclosed wherein the fluorescer is a perylene derivative.
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1. A composition adapted to be reacted with hydrogen peroxide to provide chemiluminescent light, said composition containing a compound having the formula: ##STR5## wherein each R is, individually, a substituted or unsubstituted c1 -c6 alkyl or phenyl radical, X,Y, and Z are, individually, OR1 and R1 is a substituted or unsubstituted phenyl the substituents of said substituted radicals being c1 -c4 alkyl, c1 -c4 haloalkyl or halo, the amount of said compound being such as to provide visible light.
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12. A method of producing chemiluminescent light which comprises adding to the composition of
13. A composition according to
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The present invention relates to the production of light by chemiluminescence and, more particularly, the use of specific fluorescent agents for this purpose.
The principle and the techniques for the production of chemiluminescent light are described in detail in
U.S. Pat. No. 4,678,608 which is incorporated in the present description as a reference.
Chemiluminescence is produced by a reaction in the liquid phase of an activator such as hydrogen peroxide with a fluorescent agent and an oxalate. Optionally, other secondary compounds can be present In general, they are also fluorescent agents, which modify the characteristics of the emitted light.
Until now, there exits no simple means to produce red chemiluminescent light which is satisfactory for the users, although there has been a report on the use of derivatives of naphthacenes and tetracenes as auxiliary fluorescent agents to produce red chemiluminescence Thus, U.S. Pat. No. 3,557,233 cites the use of 5,12-bis(phenylethynyl)naphthacene, pentacene and 6,13-bis(phenylethynyl)pentacene as a fluorescent agent to produce fluorescence at a wavelength of 578, 578 and 690 nanaometes, respectively. Nevertheless, these compounds were shown to be unstable in the reaction and the duration of the chemiluminescence obtained in this manner is too short to be of commercial interest.
However, on the market side, there exists a significant demand for red chemiluminescent light. Red is a color which is greatly appreciated by the public at large and, in addition, under several circumstances where chemiluminescence is applied for safety and rescue purposes, the color red is imperatively required because of traditions or conventions.
Because there is no commercially usable red chemiluminescent liquid, U.S. Pat. No. 4,379,320 has proposed a method which consists in using a non-red chemiluminescent liquid, whose luminosity is satisfactory both with regard to intensity as well as duration, and to use it in a container whose translucent walls are dyed in the composition by a red fluorescent dye. The claimed chemiluminescent liquid emits wavelength which is lower than that of the dye of the wall. Thus, the color is yellow is cited preferentially. Some articles based on this principle are in fact commercially available on a large scale; however, the drawback that is mentioned is that it produces a red-orange color and not a true pure red color, the latter could be designated as "signal red" with an emission which would be at a wavelength of approximately 625 nanometers.
It has now been observed unexpectedly that known fluorescent dyes which are soluble in organic solvents and, particularly, esters, can be used advantageously to produce a chemiluminescent light, particularly a red chemiluminescent light, which is particularly appreciated by the users and which differs from the colors produced in the prior art.
The present invention relates to a composition adapted to be reacted with hydrogen peroxide to provide chemiluminescent light, said composition containing a compound having the formula: ##STR1## wherein each R, individually, is substituted or unsubstituted aliphatic, aromatic or heterocyclic radical, X, Y, and Z are, individually, chlorine fluorine, bromine or OR1 and R1 is a substituted or unsubstituted phenyl, the amount of said compound being such as to provide visible light, said phenyl substituents being, for example, alkyl, substituted alkyl, halo etc.
Preferably, the compounds represented by Formula I, above, are those wherein each R, individually, is a ##STR2## wherein each R2, individually, is a straight chain alkyl group of at least 2 carbon atoms, such as ethyl, n-propyl, n-butyl and the like.
More preferably, the compounds represented by Formula I, above, are those wherein each R, individually, is 1) a phenyl group containing, in the ortho position, a branched alkyl group having at least 3 carbon atoms or 2) a neopentyl group. Suitable substituents include 2-isopropylphenyl; 2-isobutylphenyl; 2-isopentylphenyl etc.
Even more perferably, the compounds represented by Formula I, above, are those wherein each R, individually, is a ##STR3## wherein R2 is a branched, alkyl group of at least 3 carbon atoms, such as those described above.
Most preferably, the fluorescent dyes according to the invention are substituted dicarboximide perylenes with general formula: ##STR4## where substituents R2, are branched alkyl groups of at least 3 carbon atoms, as described above, and groups R4, which may be different or identical, represent phenoxy or substituted phenoxy groups.
The substituted phenoxy groups R4 can be, for example, halophenoxy i.e. p-bromophenoxy, p- or o-chlorophenoxy, p- or o-fluorophenoxy or alkylphenoxy e.g. p-t-butylphenoxy. R2 is preferably isopropyl.
The preferred fluorescent dye is 1,6,7,12-tetra-phenoxy-N-N'-bis(2,6-diisopropylphenyl)-3,4,9, 10-perylene dicarboximide which corresponds to the above Formula (II) with R2 being isopropyl and R4 phenoxy.
The above-mentioned compounds are described in European Patent Application No. 227,980 and U.S. Pat. No. 4,845,223. The preferred compound is used under the trade name Lumogen F Rot 200 as a fluorescent dye in plastic materials with light-concentration effects. These patents also describe the preparation of analog derivatives.
Some dicarboximide perylenes have already been used for the production of chemiluminescent light. Thus, Pat. No. 4,678,608 claims the use of dyes of this family, not particularly substituted in position 1, 6, 7, or 12. These derivatives are however used in association with another fluorescent compound. The association can produce advantageously a white color, which is difficult to produce otherwise, or other colors, but different from red.
To produce chemiluminescent light, the compounds according to the present invention are used under the conditions already described in the literature, particularly in said U.S. Pat. No. 4,678,608. In general, one can use any known solvent or oxalate which can be used for the production of chemiluminescent light. The solvent can be an ester, aromatic derivatives or a chlorinated hdyrocarbon. Preferably, phthalates are used, in particular dibutyl phthalate.
Oxalate, such as those described in U.S. Pat. Nos. 3,749,679 and 3,846,316, incorporated herein by reference, may be used to produce the chemical reaction to cause chemiluminescent light when mixed with the fluorescers described above, with bis(2,4,5-trichloro-6-carbopentoxylphenyl) oxalate being exemplary. Substituted carbalkoxyphenyl oxalate are the preferred class of oxalates used herein the oxalate and perylene fluorescer each being used in sufficient quantity to cause chemiluminescent light, preferably in a 20-40:1 oxalate to fluorescer, molar ratio.
The perylene fluorescer is used in amounts ranging from about 0.005 mole per liter of oxalate solution i.e. the solvent solution of the oxalate and the perylene fluorescer.
Useful catalysts are disclosed in U.S. Pat. No. 3,775,336, incorporated herein by reference, in concentrations disclosed therein, and usually in the solvent solution of the hydrogen peroxide.
The areas of application are well known and they include the production of useful objects, particularly signs, decorative objects, games and gadgets such as chemiluminescent colors, etc... In such articles, the chemiluminescent light is produced by mixing a solution of an activator, in general oxygenated water (hydrogen peroxide), with a solution which contains the derivatives of perylene and an oxalate diester. The article consists of, in its passive state, two compartments between which a communicating link was established at the time of use, for example as described in French Pat. No. 87 11296, for the case of flexible luminescent tubes.
The following example will illustrate the invention without limiting it.
To a liter of dibutyl phthalate, heated to 150°C and purged with nitrogen, one adds 110 g of bis(2,4,5-trichloro-6-carbopentoxylphenyl) oxalate and 1 part of 1,6,7,12-tetraphenoxy-N-N'-bis(2,6-diisopropyl-phenyl)-3,4,9.10-perylene dicarboximide, by continuing the mixing until dissolution is completed.
In addition, one prepares a mixture of 80 parts by volume of dimethyl phthalate and 20 parts of t-butanol, in which one dissolves 50 g of hydrogen peroxide and 25 mg of sodium salicylate. This solution constitutes the activator.
To produce the chemiluminescence, one mixes one part by volume of the activator and 3 parts of the colored solution in a container with translucent walls.
One compares the chemiluminescence emitted by such a mixture to the chemiluminescence emitted by a commercial cylinder ("Cyalume®) red manufactured by American Cyanamid) which contains a chemiluminescent solution which emits in the yellow range and whose translucent cylinder walls are colored composition by a red fluorescent dye. The cylinder is activating by breaking a glass ampule which floats in the colored liquid and which is filled with the activator solution.
One observes that, in the case of the Cyalume® article, the initial luminous intensity is, in a first step, higher than that produced according to the present invention. after approximately three hours, the luminosities are equivalent; subsequently, the system according to the invention produces a more intense light. During the entire test duration, the light emitted according to the invention is comparable to the wanted red "signal" light and not to a red-orange as produced by the above-mentioned commercially available article.
The procedure of Example 1 is again followed except that the 1,6,7,12-tetraphenoxy-N,N1 -bis(2,6-diisopropyl -phenyl)-3,4,9,10-perylene dicarboximide is replaced by other perylene compounds according to the generic formulae above. In each instance, a red chemiluminescent light is produced in the absence of any other fluorescer in the solution or in the walls of the container.
Example 2. 1,7-dichloro-6, 12-diphenoxy-N,N1 -bis(2,6-diisopropylphenyl)-3,4,9,10-perylene dicarboximide.
Example 3 1,6,7,12-tetra(p-bromophenoxy)-N,N1 -bis(2,6-diisopropylphenyl)-3,4,9,10-perylene dicarboximide.
Example 4. 1,6,7,12-tetraphenoxy-N,N1 -dineopentyl-3,4,9,10-perylene dicarboximide.
Example 5. 1,6,7,12-tetra(p-t-butylphenoxy)-N,N1 -dineopentyl-3,4,9,10-perylene dicarboximide.
Example 6. 1,6,7,12-tetra(o-chlorophenoxy)-N,N1 -bis(2,6-diisopropylphenyl)-3,4,9.10-perylene dicarboximide.
Example 7 1,6,7,12-tetra(p-fluorophenoxy)-N,N1 bis(2,6-diisopropylphenyl)-3,4,9,10-perylene dicarboximide.
Example 8. 1,6,7,12-tetra(p-fluorophenoxy)-N,N1 -bis(2,6-diisopropylphenyl)-3,4,9,10-perylene dicarboximide.
Example 9. 1,6,7,12-tetra(p-chlorophenoxy)-N,N1 -bis(2,6-diisopropylphenyl)-3,4,9,10-perylene dicarboximide.
Example 10. 1,6,7,12-tetra(p-t-butylphenoxy)-N,N1 dineopentyl-3,4,9,10-perylene dicarboximide.
Example 11. 1,6,7,12-tetraphenoxy-N,N1 -diethyl-3,4,9,10-perylene dicarboximide.
Example 12. 1,6,7,12-tetraphenoxy-N,N1 -bis (2,6-diethylphenyl)-3,4,9,10-perylene dicarboximide.
Example 13. 1,7,-dibromo-6,12-diphenoxy-N,N1 -bis-(2-isopropylphenyl)-3,4,9,10-perylene dicarboximide.
Ladyjensky, Jacques, Van Moer, Andre
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